Journal
CERAMICS INTERNATIONAL
Volume 39, Issue 7, Pages 7831-7838Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2013.03.043
Keywords
Pseudo-capacitance; Sol-gel; Specific capacitance; Manganese acetate; Iron acetate
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Funding
- National Science Council of Taiwan
- National United University
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Manganese oxide electrodes possessing pseudo-capacitance behaviors were successfully made with a simple sol-gel method. The experimental results showed that the specific capacitance was 101.2 F/g for pure manganese oxide films after annealing at 300 degrees C. However, the specific capacitance increased to 232.3 Fig with iron acetate (1.0 mol% Fe) addition and after annealing at 350 degrees C. The surface morphology observations revealed that the annealing temperature of 350 degrees C produced a higher surface area film with smaller pores. X-ray diffraction results showed that the manganese-iron oxide was composed of Mn3O4 and Mn2O3 phases, without iron oxide diffraction peaks. The manganese-iron oxide electrode with Mn3O4 and Mn2O3 phases exhibited good electrochemical performance and capacitance efficiency. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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